Spur



FIG. 1 is a perspective view of a spur, showing my new design therefor;

FIG. 2 is a top plan view, the bottom plan view being a mirror image thereof;

FIG. 3 is a left side elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a front elevational view;

FIG. 6 is a rear elevational view; and,

FIG. 7 is another perspective view thereof; the boot shown in broken lines is for illustration only and forms no part of the claimed design. 

The ornamental design for a spur, as shown and described. 